Alert archive / Louisiana / Flash Flood Warnings in 2012

Flash Flood Warning 31, NWS New Orleans, LA

June 10, 2012Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jun 10, 2012, 10:13 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 10, 2012, 10:13 AM CDT (15:13 UTC)
Expired: Jun 10, 2012, 11:15 AM CDT
In force: 62 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.2 hours before the alert went out and 14 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1831 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

898 
WGUS54 KLIX 101513
FFWLIX
LAC103-101615-
/O.NEW.KLIX.FF.W.0031.120610T1513Z-120610T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1013 AM CDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...SLIDELL...MANDEVILLE...EDEN ISLE...
  COVINGTON...

* UNTIL 1115 AM CDT

* AT 1009 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
  FLOODING CONTINUED ACROSS SOME LOCATIONS OF ST. TAMMANY PARISH...
  PARTICULARLY IN THE MANDEVILLE AND COVINGTON AREAS WHERE SOME
  ROADWAYS ARE UNDER WATER. NATIONAL WEATHER SERVICE DOPPLER RADAR
  CONTINUED TO INDICATE LIGHT TO OCCASIONALLY MODERATE RAINFALL OVER
  THE PARISH. ADDITIONAL RAINFALL AMOUNTS UP TO AN INCH MAY OCCUR
  THROUGH THE REMAINDER OF THE MORNING HOURS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PEARL
  RIVER...ABITA SPRINGS...FOLSOM...BUSH AND SUN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3066 8983 3056 8980 3045 8968 3038 8967
      3034 8963 3029 8965 3023 8962 3018 8957
      3019 8952 3018 8952 3015 8959 3017 8968
      3016 8972 3025 8987 3026 8998 3030 8999
      3035 9006 3039 9019 3036 9024 3071 9026

$$

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 3:42 AM CDT	Special Marine Warning	LIX		33 min
Jun 10, 4:21 AM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
Jun 10, 6:44 AM CDT	Special Marine Warning	LIX		46 min
Jun 10, 6:46 AM CDT	Special Marine Warning	LIX		29 min
Jun 10, 7:13 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
Jun 10, 7:34 AM CDT	Special Marine Warning	LIX		56 min
Jun 10, 7:47 AM CDT	Special Marine Warning	LIX		58 min
Jun 10, 8:30 AM CDT	Special Marine Warning	LIX		30 min
Jun 10, 8:56 AM CDT	Special Marine Warning	LIX		64 min
Jun 10, 9:26 AM CDT	Special Marine Warning	LIX		34 min
Jun 10, 10:03 AM CDT	Special Marine Warning	LIX		42 min
Jun 10, 10:06 AM CDT	Special Marine Warning	LIX		39 min
Jun 10, 10:48 AM CDT	Special Marine Warning	LIX		42 min
Jun 10, 11:40 AM CDT	Special Marine Warning	LIX		50 min
Jun 10, 1:38 PM CDT	Special Marine Warning	LIX		37 min

Nearby

Flash Flood Warnings in Louisiana, 2012 Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.